1. 4 red rocks give out only 1 red brick, it should give four (4 stone blocks give 4 stone bricks).
2. red cobblestone stairs, red rock stairs and their relative slabs are missing.

thanks for the awesome mod.

Thanks for noticing this.

red cobblestone stairs, red rock stairs and their relative slabs are missing.

This is an enhancement, so I created a separate issue. Issue #31.